RU2802934C1 - Device for the production of items from slags of metallurgical production (options) - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: production of mineral wool from metallurgical slag for the construction industry. The first version of the device, in which the storage and melting modules are connected directly or through a channel, while the storage module contains heating means located inside it, a dosing device is located between the storage and melting modules, while the device is configured to move the charge processed in the melting module through the outlet channel for briquetting or molding, and the distance h between the surfaces of the heating means closest to each other to the diameter d of the heating means is in the range of 1÷5. The second version of the device, in which at least two melting modules are connected directly and/or through channels to the storage module.

EFFECT: streamlined predictable production process without degrading the characteristics of the manufactured product.

10 cl, 7 dwg, 2 ex

Description

The claimed invention relates to the field of production of thermal insulation materials, in particular to preliminary batch preparation in the production of mineral wool fiber.

A device is known for producing glass fiber from a final stream of molten glass by melting vitrified materials, containing at least two separate melting modules, both of which simultaneously or alternately provide a melt of vitrified materials, in which: - module A(1) is mainly equipped with heating means in the form of air burners and/or immersion electrodes and into which vitrification materials are supplied, and - module B(2) is mainly equipped with heating means in the form of an immersion burner/immersion burners and into which vitrification materials are supplied for the production of foam glass, while the melting module A(1) and melting module B(2) are both directly connected or via transmission channels (4, 5) to a mixing module C(3), which is equipped with at least one mixing means selected from bubblers or submersible burners, without glass clearing chamber between module B(2) and mixing module C(3), wherein mixing module C is connected directly to the channel (6) which supplies the fiber spinning devices without glass clearing chamber between mixing module C and spinning devices fibers (RU No. 2 471 727, IPC C03B 5/235, publ. 01/10/2013).

The disadvantage of the analogue is the complexity of production caused by the presence of two furnaces with different heating means, which complicates maintaining them in a constant working condition. Mixing is carried out in another module, which also complicates the production process, and there is a possibility of a conflict between the melts from two furnaces, which may subsequently affect the quality of mineral wool.

The closest technical solution is a device for preheating the charge, including a supply hopper equipped in the lower part with a structure for the outlet of waste gases in the form of crossed perforated pipes, protected by an inverted V-shaped plate made of a steel angle with an angle of 45°, a gas duct for supplying waste gases, equipped a high-pressure fan and connected to a structure for the exit of exhaust gases, and a pipe for supplying the heated charge to the ore-smelting furnace (RU No. 2 547 182, IPC C03B 3/02, publ. 04/10/2015).

The disadvantage of the closest technical solution is the impossibility of ensuring continuous production, which is caused by the lack of special heating means in preheating the charge and the insufficient ability of the exhaust gases to preheat the charge, for example, when making a large-volume feed hopper, which will cause underheating of the charge. Also, heating with waste gas does not allow for controlled heating of the charge during mass production, and accordingly does not ensure predictability and planability of the production process.

The technical problem solved by the claimed invention is the elimination of the disadvantages of analogues.

The objective of the claimed invention is to create a device for the production of products from metallurgical slag, providing an in-line production process without deteriorating the characteristics of the manufactured product with the ability to set the predicted volume of the finished product.

The technical result of the claimed invention is to create a device for the production of products from metallurgical slag, providing an in-line predictable production process without deteriorating the characteristics of the manufactured product.

The specified technical result in the first embodiment is achieved by the fact that the device for the production of products from metallurgical slag contains storage and melting modules; according to the invention , the storage and melting modules are connected directly or through a channel, while the storage module contains heating means located inside it, between the storage and the melting module there is a dosing device, wherein the device is configured to move the charge processed in the melting module through the output channel for briquetting or molding, and the distance h between the surfaces of the heating means closest to each other to the diameter d of the heating means is in the range 1÷5.

The technical result according to the second option is achieved in that the device for the production of products from metallurgical slag contains storage and melting modules, as well as an output channel, according to the invention contains at least two melting modules connected directly and/or through channels to the storage module, with In this case, the storage module contains heating means located inside it, a dosing device is located between the storage and melting modules, and the device is configured to move the charge processed in the melting module through the outlet channel for briquetting or molding, and the distance h between the heating surfaces closest to each other means to the diameter d of the heating means is in the range 1÷5.

In particular, the storage module is equipped with a device for receiving material.

In particular, the melting module is equipped with a material receiving device.

In particular, a funnel is used as a device for receiving material.

In particular, the receiving funnel is a lined structure that provides damping of the jet velocity when draining the molten material from the ladle and shaping the direction of the jet into the storage module, eliminating splashing of the slag material during overflow.

In particular, liquid material is received by the material receiving device.

In particular, solid material is received by the material receiving device.

In particular, the material receiving device receives material with a temperature equal to the ambient temperature.

In particular, the material receiving device receives heated material with a temperature of more than 1000°C, for example 1200-1500°C.

In particular, the melting module contains heating means.

In particular, the melting module and the storage module contain the same heating means, designs of heating means units, and dosing devices.

In particular, the melting module and the storage module contain various heating means, designs of heating means units, and dosing devices.

In particular, heating means are air burners.

In particular, the heating means are submersible electrodes.

In particular, the volume of the storage module is larger than the volume of the melting module, for example, it is at least 1% larger than the volume of the melting module, may be at least 75% of the total volume of the two melting modules, or be at least the total volume of the two melting modules.

In particular, when using electrodes as heating means, their disintegration diameter is 1300-1600 mm.

In particular, the distance k from each heating means in the form of an electrode to the lining is greater than the diameter of their disintegration, for example, 1800-2500 mm.

In particular, the storage module is made in a water-cooled housing with a lining.

In particular, the storage module is equipped with an automated control system (ACS) for monitoring the body temperature with cooling control points, of which there can be 8-20 pieces.

In particular, the storage module is equipped with a transformer to supply electricity for heating.

In particular, the storage module is equipped with a mixer.

In particular, liquid blast furnace slag acts as the molten material flowing from the ladle into the storage module.

The proposed invention is illustrated by drawings.

In fig. 1 - storage and melting modules connected through a channel; in fig. 2 - storage and melting modules connected directly; in fig. 3 - storage and melting modules connected through channels; in fig. 4 - storage and melting modules connected directly; in fig. 5 - storage and melting modules connected through channels and directly; in fig. 6 - shows the location of the heating means of the storage module; in fig. 7 - shows a general view of the module.

The figures indicate: 1 - storage module; 2 - melting module; 3 - channel; 4 - heating means; 5 - dosing device; 6 - device for receiving material; 7 - output channel.

The device for the production of products from metallurgical slag (Fig. 1, 2) according to the first version contains storage 1 and melting 2 modules. The storage module 1 and melting module 2 are connected directly or through channel 3, while the storage module 1 contains heating means 4 located inside the storage module 1. Between the storage module 1 and melting module 2 there is a dosing device 5. The storage module 1 contains a device for receiving material ( charge) 6, and the melting module 2 contains an output channel 7.

The production of mineral wool from metallurgical production slag requires that the production process line be built in such a way that the slag charge supplied to the melting stage is at a given temperature, which is associated with the peculiar properties inherent in the metallurgical production slag charge. If this condition is not met, it is possible, for example, overheating of the charge and the occurrence of chemical interactions in it that negatively affect the finished product made from such a charge, or the production of a product that is not suitable for further use, that is, going beyond the limits established by the invention can deteriorate the quality of the finished product. At the same time, the possibility of using the device for the production of mineral wool from another charge cannot be excluded.

To produce mineral wool from metallurgical slag in a continuous mode, it is necessary to install a storage module 1 in front of the melting module 2, the volume of which can be replenished regardless of the melting process in the melting module 2 of the previously loaded material, but at any convenient time. In this case, the storage module 1 contains heating means 4, which maintain a given temperature necessary to supply the next dose of molten charge for the production of mineral wool from the storage module 1 to the melting module 2, and if necessary, the charge is heated to a given temperature. The temperature in storage module 1 is set in such a way that the charge coming from storage module 1 corresponds to the temperature of its further processing/processing in melting module 2, which also ensures the continuity of the production process. The heating temperature of the charge in storage module 2 can be controlled using measuring instruments built into it. Storage module 1 is equipped with an automated control system (ACS) for monitoring the temperature of the device body with cooling control points, the number of which is determined by the volume of the storage module; control points can be, for example, 8-20 pieces. The storage module 1 and melting module 2 modules can be made in a water-cooled housing with a lining to allow the device to be cooled if such a need arises.

Of course, to be able to supply the charge from the storage module 1 to the melting 2, these modules must be connected through channels 3 (Fig. 1) or directly (Fig. 2), but between the storage 1 and melting 2 modules a dosing device 5 must be installed. In the in-line mode, the charge processed in the melting module 2 then goes to the next stage of the production cycle, for example, for briquetting or molding through the output channel 7, while the useful volume of the melting module 2 is partially released for the next dose of the charge. At this stage, the already prepared and preheated charge from the storage module 1 is fed through the dosing device 5 into the melting module 2, occupying its released useful volume. Without a dosing device 5, there is a high probability of overfilling or underfilling of the charge into the melting module 2, which can lead to its damage or failure, which will not allow the implementation of the on-line production process. Control over the volume of the dose issued by the dosing device can be realized using a sensor that takes readings from the melting module 2 (for example, according to the level of the melt), the readings are processed and, based on them, information about the required volume of the next dose is transmitted. The transmission of readings and the addition of charge into the melting module 2 occurs in real time - continuously. Manual dosing is possible, but very labor-intensive and complex, which is associated with the need for a worker to monitor the level of the charge in melting module 2, as well as topping it up manually, which increases the risk of overflow, the possibility of failure of module 2 and the subsequent suspension of the flow production, the difficulty arises in the fact that the charge is heated in a ladle, which complicates the process of maintaining it in the temperature range required for further production. Also, when pouring from a ladle, there is a high risk of hot mixture splashing, which is not safe for workers.

Thanks to the introduction and implementation of the device proposed by the invention for the production of products from metallurgical slag, it becomes possible to ensure continuous production, while ensuring occupational safety.

The device for the production of products from metallurgical slag (Fig. 3, 4, 5) according to the second option generally repeats the device according to the first option, except that the device according to the second option contains at least two melting modules 2 connected directly (Fig. 3) and/or through channels 3 with storage module 1 (and - Fig. 5, or - Fig. 4). Connecting storage module 1 with at least two melting modules 2 will not only ensure continuous production of mineral wool, but also increase the efficiency of continuous production with the production of a larger volume of finished product, since one storage module 1 will work on more than 1 melting module at once 2, for example, two (Fig. 3), three (Fig. 4), four (Fig. 5), etc. Thus, one storage module 1 will provide a continuous melting process in several melting modules 2 at once; accordingly, from each melting module 2 the processed charge will move further along the production process. This solution creates a device for the continuous production of mineral wool with a high degree of efficiency in the output stream of finished products. It is obvious that the degree of efficiency and the volume of the final product will increase in direct proportion with the increase in the number of melting modules 2 connected to the storage module 1.

The connection of the storage 1 and melting 2 modules is implemented directly (Fig. 2, 4), through channels 3 (Fig. 1, 3), and a hybrid version can also be used, including a connection through channel 3 and a direct connection (Fig. 5). In this case, various quantitative variations of direct connection and connection through channel 3 of storage 1 and melting 2 modules can be used. And also the length of channel 3 is determined based on the needs of a specific production; it can be implemented either long or short.

The further description relates to any of the proposed variants of the device for the production of products from metallurgical slag.

To ensure additional efficiency of the flow process for the production of mineral wool from metallurgical production slag, the storage module 1 is made with a volume exceeding the volume of the melting module 2, which ensures the creation of additional accumulated volume in the storage module 2 for the timely supply of the charge to the melting/smelting modules 2, and, accordingly, the possibility of continuous replenishment of the empty useful volume of melting/smelting modules 2 for continuous production.

The volume of the storage module 1 can be at least 1% larger than the volume of the melting module 2, can be at least 75% of the total volume of the two melting modules 2, or be at least the total volume of the two melting modules 2. The volume of the melting module 2 is determined the need to ensure a specific production cycle and the speed of its implementation.

Heating means 4 are necessary for timely heating of the poured material into the storage module 1 to ensure the on-line production process. It was experimentally established that the ratio of the distance h between the surfaces of the heating means closest to each other to the diameter d of the heating means 4 is in the range 1÷5. This is due to the need to maintain a given temperature in the storage module 1 to enable rapid supply of material to the melting module 2. Fulfilling the h/d ratio <1 leads to the need to install a large number of heating means 4 and increasing the cost of the assembled module 1, and maintaining the h/d ratio > 5 leads to a discharged arrangement of the heating means 4 and their inability to heat to the required temperature to ensure the flow process.

The heating means 4 can be electrodes, the diameter of which can be in the range of 1300-1600 mm. In this case, the distance k from each heating means 4 in the form of an electrode to the lining must be greater than the diameter of their disintegration, for example, 1800-2500 mm. Making the distance k from each heating means 4 in the form of an electrode to the lining less than their disintegration diameter may make it impossible to heat the material in the storage module 1 to the required temperature, which will not allow for an ongoing production process, or it may deteriorate the characteristics of the finished product.

Air burners or other means that provide heating of the material in the storage module 1 can be used as heating means 4, and a hybrid version of heating means 4 can also be used.

The melting module 1 (Fig. 2, 4) may also contain heating means 4, similar to the heating means 4 of the storage module 1 in terms of filling and design, or different heating means 4 from the storage module 1. The melting module 2 may also contain dosing devices at the outlet 5, of a similar or different design from the dosing devices 5 of the storage module 1.

The storage 1 and/or melting 2 modules contain mixers to increase the efficiency of the production process. When using 4 electrodes as heating means, the electric arc that occurs between the electrodes will act as a mixer.

The storage module 1 is equipped with a transformer, built, for example, into its housing, to supply electricity for heating to increase the efficiency of the process of continuous production of mineral wool.

The device for receiving material 6 can be equipped with both the storage module 1 and the melting module 2 (Fig. 2, 4). The device for receiving material 6 of the melting module can be located at the point where the charge is supplied from the storage module 1 to the melting module 2, and the melting module 2 can also contain an additional device for receiving material 6 to allow additional supply of the charge directly to the melting module 2. As device for receiving material 6, a funnel can be used, which can be a lined structure that provides damping of the jet speed when draining the melt of material from the ladle into module 1 and/or 2 and the formation of the direction of the jet into storage 1 and/or melting 2 modules, excluding splashing of the material (charge) during overflow. The device for receiving material 6 can receive both solid and liquid material, both unheated (at ambient temperature) and heated, the temperature of which can be more than 1000°C, for example, 1200-1500°C.

A general side view of the storage module 1 and/or melting module 2, how they can be implemented, is shown in Fig. 7.

An example of an implementation according to the first option could be a device for the production of products from metallurgical slag, containing storage 1 and melting 2 modules connected directly, while the storage module 1 contains heating means 4 located inside it, and between the storage 1 and melting 2 modules there is dosing device 5. The storage module 1 contains a device for receiving material 6, and the melting module 2 contains an output channel 7. The device for receiving material 6 is made in the form of a lined funnel. The distance h between the surfaces of the heating means 4 closest to each other to the diameter d of the heating means 4 is equal to 1. The heating means 4 in the storage module 1 are submersible electrodes with a disintegration diameter of 1600 mm, the distance k from each heating means 4 in the form of an electrode to the lining of the module is made more than the diameter of their decay. Storage module 1 is equipped with a transformer for supplying electricity for heating and an automatic control system for monitoring the body temperature with cooling control points.

The next example of implementation according to the first option can be a device for the production of products from metallurgical slag, repeating the previous example of implementation, with the exception of the following points. The storage module 1 and melting module 2 are connected via channel 3. The melting module 2 contains a device for receiving material 6 at the outlet of channel 3, and a dosing device 5 is installed in channel 7. The storage module 1 has a volume 10% greater than the volume of melting module 2. Distance h between the surfaces of the heating means 4 closest to each other to the diameter d of the heating means 4 is in the range 2÷3. The heating means 4 in the storage module 1 are submersible electrodes with a disintegration diameter of 1400 mm, and in the melting module 2 burners with a diameter of 1500 mm are installed. The distance k from each heating means 4 in the form of an electrode to the module lining is greater than the diameter of their disintegration.

An example of an implementation according to the second option can be a device for the production of products from metallurgical slag, which contains a storage module 1 and two melting modules 2 connected directly to the storage module 1, while the storage module 1 contains heating means 4 located inside it, and between The accumulative 1 and melting modules 2 contain a dosing device 5. The accumulative module 1 contains a device for receiving material 6, and the melting module 2 contains an output channel 7. The device for receiving material 6 is made in the form of a lined funnel. The distance h between the surfaces of the heating means 4 closest to each other to the diameter d of the heating means 4 located in the storage module 1 is equal to 2, and in the melting module is equal to 3. The heating means 4 in the storage module 1 are submersible electrodes with a disintegration diameter of 1450 mm, and the distance k from each heating means 4 in the form of an electrode to the module lining is greater than the diameter of their disintegration. Storage module 1 is equipped with a transformer for supplying electricity for heating and an automatic control system for monitoring the body temperature with cooling control points.

The next example of implementation according to the second option can be a device for the production of products from metallurgical slag, repeating the previous example of implementation, with the exception of the following points. The device contains a storage module 1 and four melting modules 2, with two melting modules 2 connected to the storage module 1 directly, and two other melting modules 2 connected to the storage module 1 through channels 3, with each connection of the storage module 1 with the melting module 2 installed dosing device 5. One of the melting modules 2 contains a device for receiving material 6 at the outlet of channel 3 and in the body of the melting module 6, and a dosing device 5 is installed in channel 7. The storage module 1 is made with a volume equal to the total volume of two melting modules 2. Three melting modules 2 contain heating means 4. The distance h between the surfaces of the heating means 4 closest to each other to the diameter d of the heating means 4 located in the storage module 1 is equal to 1, the specified distance in one of the melting modules 2 is 5, in the other 4, and in the third 3. The heating means 4 in the storage module 1 and two melting modules are submersible electrodes with disintegration diameters of 1450 mm and 1550 mm, respectively, and in the other two melting modules burners with diameters of 1350 mm and 1600 mm are installed. The distance k from each heating means 4 in the form of an electrode to the module lining is greater than the diameter of their disintegration. Storage module 1 is equipped with an automatic control system for housing temperature control with cooling control points.

In comparison with the known technical solution, the proposed invention, with its essential features, makes it possible to achieve high efficiency of the production cycle, ensure its continuity, organizing in-line production with a predictable volume, while the in-line production is organized in such a way that it does not degrade the quality of the finished product, and, moreover, is safe for production workers.

Claims (10)

1. A device for the production of products from metallurgical slag, containing storage and melting modules, characterized in that the storage and melting modules are connected directly or through a channel, while the storage module contains heating means located inside it, and a dosing unit is located between the storage and melting module device, wherein the device is configured to move the charge processed in the melting module through the output channel for briquetting or molding, and the distance h between the surfaces of the heating means closest to each other to the diameter d of the heating means is in the range 1÷5. 2. A device for the production of products from metallurgical slag, containing storage and melting modules, characterized in that it contains at least two melting modules connected directly and/or through channels to the storage module, while the storage module contains heating means located inside there, between the storage and melting modules there is a dosing device, wherein the device is configured to move the charge processed in the melting module through the output channel for briquetting or molding, and the distance h between the surfaces of the heating means closest to each other to the diameter d of the heating means is in the range 1÷5. 3. A device according to any of the previous paragraphs, characterized in that the storage module has a volume exceeding the volume of the melting module. 4. Device according to claims. 1, 2, characterized in that submersible electrodes are used as heating means. 5. The device according to claim 4, characterized in that when electrodes are used as heating means, their disintegration diameter is 1300-1600 mm. 6. Device according to claims. 4, 5, characterized in that the distance k from each heating means in the form of an electrode to the module lining is greater than the diameter of their disintegration. 7. The device according to claim 1, characterized in that the storage module is equipped with a transformer to supply electricity for heating. 8. The device according to claim 1, characterized in that the storage module and melting module are equipped with a device for receiving material. 9. The device according to claim 8, characterized in that a funnel is used as a device for receiving material, which is a lined structure that provides damping of the jet speed when draining the melt of material from the ladle and the formation of the direction of the jet into the storage module, eliminating splashing of the slag material when overflow. 10. The device according to claim 1, characterized in that the storage module is equipped with an automatic control system for monitoring the body temperature with cooling control points.